PartsManager: some fixes

GitOrigin-RevId: fedd9458f18179cdabef579cdc251f8006a3f61e

td/telegram/files/FileLoader.cpp

@@ -66,11 +66,13 @@ void FileLoader::update_local_file_location(const LocalFileLocation &local) {
 }
 
 void FileLoader::update_download_offset(int64 offset) {
+  if (parts_manager_.get_streaming_offset() != offset) {
     parts_manager_.set_streaming_offset(offset);
     //TODO: cancel only some queries
     for (auto &it : part_map_) {
       it.second.second.reset();  // cancel_query(it.second.second);
     }
+  }
   update_estimated_limit();
   loop();
 }
@@ -279,6 +281,10 @@ void FileLoader::on_result(NetQueryPtr query) {
 }
 
 void FileLoader::on_part_query(Part part, NetQueryPtr query) {
+  if (stop_flag_) {
+    // important for secret chats
+    return;
+  }
   auto status = try_on_part_query(part, std::move(query));
   if (status.is_error()) {
     on_error(std::move(status));

td/telegram/files/FileUploader.cpp

@@ -119,6 +119,9 @@ Result<FileLoader::PrefixInfo> FileUploader::on_update_local_location(const Loca
     file_type = location.partial().file_type_;
   } else {
     path = location.full().path_;
+    if (path.empty()) {
+      return Status::Error("FullLocalFileLocation whith empty path");
+    }
     local_is_ready = true;
     file_type = location.full().file_type_;
   }
@@ -160,8 +163,9 @@ Result<FileLoader::PrefixInfo> FileUploader::on_update_local_location(const Loca
     fd_ = res_fd.move_as_ok();
     fd_path_ = path;
     is_temp_ = is_temp;
+  } else if (!fd_path_.empty()) {
+    TRY_STATUS(acquire_fd());
   }
-
   if (local_is_ready) {
     CHECK(!fd_.empty());
     TRY_RESULT(local_file_size, fd_.get_size());

td/telegram/files/PartsManager.cpp

@@ -206,6 +206,9 @@ int32 PartsManager::get_ready_prefix_count() {
   }
   return res;
 }
+int64 PartsManager::get_streaming_offset() const {
+  return streaming_offset_;
+}
 string PartsManager::get_bitmask() {
   int32 prefix_count = -1;
   if (need_check_) {
@@ -452,7 +455,11 @@ void PartsManager::init_common(const std::vector<int> &ready_parts) {
   part_status_ = vector<PartStatus>(part_count_);
 
   for (auto i : ready_parts) {
-    LOG_CHECK(0 <= i && i < part_count_) << tag("i", i) << tag("part_count", part_count_);
+    LOG_CHECK(0 <= i && i < part_count_) << tag("i", i) << tag("part_count", part_count_) << tag("size", size_)
+                                         << tag("part_size", part_size_) << tag("known_prefix_flag", known_prefix_flag_)
+                                         << tag("real part_count",
+                                                std::accumulate(ready_parts.begin(), ready_parts.end(), 0,
+                                                                [](auto a, auto b) { return max(a, b + 1); }));
     part_status_[i] = PartStatus::Ready;
     bitmask_.set(i);
     auto part = get_part(i);

td/telegram/files/PartsManager.h

@@ -50,6 +50,7 @@ class PartsManager {
   int32 get_part_count() const;
   int32 get_unchecked_ready_prefix_count();
   int32 get_ready_prefix_count();
+  int64 get_streaming_offset() const;
   string get_bitmask();
 
  private: